{
  "manageEntity": {
    "action": "Save",
    "entityId": "11954104",
    "entityType": "Track",
    "nonce": "0x782962723a573884987e47264002797a40a824559b62f817860ec950cef6af2a",
    "signature": "0x23a989b804d4028650c92ef47b80826fc0fdf5023f4dcae198174f159de3b01965e820b49c05ade589b8be24c88bfb028a506e8b402e09928742bbaedbdd64941b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}